[minima] Re: band switching
- From: "pakdeDar" <pakdedarmantaoye@xxxxxxxxx>
- To: "Minima Group" <minima@xxxxxxxxxxxxx>
- Date: Sun, 9 Feb 2014 09:12:25 +0000
Hi Farhan,
I still get confuse to your statement :
- " you won't know which band you were on. each time you want to transmit,
reset and then pulse it enough number of times so you are on the correct band."
And
- " it is automatic. For example, if you tune from 7 MHz to 14mhz on the minima
but forget to manually switch the lpf, ..... "
Let me digest it and learn more as you say "...live and learn ", very nice ...
Sudarmanta
Kaspa-kaspaanlayauw ®
-----Original Message-----
From: farhanbox@xxxxxxxxx
Sender: minima-bounce@xxxxxxxxxxxxx
Date: Sun, 9 Feb 2014 08:21:21
To: <minima@xxxxxxxxxxxxx>
Reply-To: minima@xxxxxxxxxxxxx
Subject: [minima] Re: band switching
The advantage is that it is automatic. For example, if you tune from 7 MHz to
14mhz on. the minima but forget to manually switch the lpf, you will blow the
PA transistor
Sent from BlackBerry® on Airtel
-----Original Message-----
From: "pakdeDar" <pakdedarmantaoye@xxxxxxxxx>
Sender: minima-bounce@xxxxxxxxxxxxx
Date: Sun, 9 Feb 2014 07:18:31
To: Minima Group<minima@xxxxxxxxxxxxx>
Reply-To: minima@xxxxxxxxxxxxx
Subject: [minima] Re: band switching
If so, what is the advantage of using 4017 compare to manually labelled double
poles multiple throws simple rotary switch ? I am really confuse, pse explain
me.
stw
Kaspa-kaspaanlayauw ®
-----Original Message-----
From: Ashhar Farhan <farhanbox@xxxxxxxxx>
Sender: minima-bounce@xxxxxxxxxxxxx
Date: Sun, 9 Feb 2014 12:17:47
To: <minima@xxxxxxxxxxxxx>
Reply-To: minima@xxxxxxxxxxxxx
Subject: [minima] Re: band switching
sudarmanta,
you won't know which band you were on. so, each time you want to transmit,
reset and then pulse it enough number of times so you are on the correct
band.
- f
On Sun, Feb 9, 2014 at 12:06 PM, Sandeep Lohia <sandeeplohia12@xxxxxxxxx>wrote:
> why burn extra energy in relays??? they always ON !
>
> here using something like : (see attachments)
> it's just mine is MIL-RECYCLED, (air-wound properly angled)
> hope pictures say complete story :D
>
>
>
> On 09/02/2014, Ashhar Farhan <farhanbox@xxxxxxxxx> wrote:
> > here's another idea:
> >
> > use a CD4017. the 4017 has upto ten outputs. only one goes high at a
> time.
> > as you pulse the clock input, the high moves to the next pin.
> > so, what you do is this :
> > 1. Use one pin to reset the CD4017 (the high moves to the pin'0').
> > 2. generate low to high pulses to move the high output to the desired
> band.
> >
> > as the CD4017 outputs a high, you can use this to drive a 2N7000 to
> switch
> > the relays. the 2N7000 has built-in diode to prevent the flyback surge.
> >
> > - f
> >
>
>
> --
> --
> Please encourage recycling, reuse or repairing of E-waste.
> ░7░3░ ░d░e░ ░V░U░3░S░X░T░
>
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